Internal combustion engine having targeted engine lubrication

An internal combustion engine having a horizontally-opposed cylinder arrangement, including at least one pair of pistons, associated with a respective pair of opposed cylinders of the cylinder arrangement, and an output shaft, wherein each piston of the engine is arranged for reciprocating motion within a respective one of the cylinders of the cylinder arrangement, driven by combustion, and wherein the pistons are coupled to the output shaft by a coupling such that said reciprocating motion of the pistons drives rotation of the output shaft, wherein the coupling includes a connecting rod coupled to a respective pair of pistons, and the coupling further includes a crankshaft that is rotatably mounted within a slider bearing that is located for reciprocating movement relative to the connecting rod along an axis of sliding movement, the slider bearing being formed of separable parts having unitary sides that are arranged to provide opposed bearing faces for sliding contact within the connecting rod, wherein the separable parts abut together at an interface which is diagonal to the axis of sliding movement, with mating faces of the separable parts terminating along surfaces of the slider bearing which are perpendicular to the axis of sliding movement, and wherein the slider bearing is configured to provide targeted piston cooling via spray nozzles associated with the respective pair of pistons.